/*
  Copyright (c) 2011 Arduino.  All right reserved.

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the GNU Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

//****************************************************************************
// @Project Includes
//****************************************************************************
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include "Arduino.h"

// Public Methods //////////////////////////////////////////////////////////////

/* default implementation: may be overridden */
size_t Print::write(const uint8_t* buffer, size_t size)
{
    size_t n = 0;
    while (size--)
    {
        if (write(*buffer++))
        {
            n++;
        }
        else
        {
            break;
        }
    }
    return n;
}

size_t Print::print(const __FlashStringHelper* ifsh)
{
    return print(reinterpret_cast<const char*>(ifsh));
}

size_t Print::print(const String& s)
{
    return write(s.c_str(), s.length());
}

size_t Print::print(const char str[])
{
    return write(str);
}

size_t Print::print(char c)
{
    return write(c);
}

size_t Print::print(unsigned char b, int base)
{
    return print((unsigned long) b, base);
}

size_t Print::print(int n, int base)
{
    return print((long) n, base);
}

size_t Print::print(unsigned int n, int base)
{
    return print((unsigned long) n, base);
}

size_t Print::print(long n, int base)
{
    if (base == 0)
    {
        return write(n);
    }
    else if (base == 10)
    {
        if (n < 0)
        {
            int t = print('-');
            n = -n;
            return printNumber(n, 10) + t;
        }
        return printNumber(n, 10);
    }
    else
    {
        return printNumber(n, base);
    }
}

size_t Print::print(unsigned long n, int base)
{
    if (base == 0)
    {
        return write(n);
    }
    else
    {
        return printNumber(n, base);
    }
}

size_t Print::print(double n, int digits)
{
    return printFloat(n, digits);
}

size_t Print::println(const __FlashStringHelper* ifsh)
{
    size_t n = print(ifsh);
    n += println();
    return n;
}

size_t Print::print(const Printable& x)
{
    return x.printTo(*this);
}

size_t Print::println(void)
{
    return write("\r\n");
}

size_t Print::println(const String& s)
{
    size_t n = print(s);
    n += println();
    return n;
}

size_t Print::println(const char c[])
{
    size_t n = print(c);
    n += println();
    return n;
}

size_t Print::println(char c)
{
    size_t n = print(c);
    n += println();
    return n;
}

size_t Print::println(unsigned char b, int base)
{
    size_t n = print(b, base);
    n += println();
    return n;
}

size_t Print::println(int num, int base)
{
    size_t n = print(num, base);
    n += println();
    return n;
}

size_t Print::println(unsigned int num, int base)
{
    size_t n = print(num, base);
    n += println();
    return n;
}

size_t Print::println(long num, int base)
{
    size_t n = print(num, base);
    n += println();
    return n;
}

size_t Print::println(unsigned long num, int base)
{
    size_t n = print(num, base);
    n += println();
    return n;
}

size_t Print::println(double num, int digits)
{
    size_t n = print(num, digits);
    n += println();
    return n;
}

size_t Print::println(const Printable& x)
{
    size_t n = print(x);
    n += println();
    return n;
}

// Private Methods /////////////////////////////////////////////////////////////

size_t Print::printNumber(unsigned long n, uint8_t base)
{
    char buf[8 * sizeof(long) + 1]; // Assumes 8-bit chars plus zero byte.
    char* str = &buf[sizeof(buf) - 1];

    *str = '\0';

    // prevent crash if called with base == 1
    if (base < 2)
    {
        base = 10;
    }

    do
    {
        char c = n % base;
        n /= base;

        *--str = c < 10 ? c + '0' : c + 'A' - 10;
    }
    while (n);

    return write(str);
}

size_t Print::printFloat(double number, uint8_t digits)
{
    size_t n = 0;

    if (isnan(number))
    {
        return print("nan");
    }
    if (isinf(number))
    {
        return print("inf");
    }
    if (number > 4294967040.0)
    {
        return print ("ovf");    // constant determined empirically
    }
    if (number < -4294967040.0)
    {
        return print ("ovf");    // constant determined empirically
    }

    // Handle negative numbers
    if (number < 0.0)
    {
        n += print('-');
        number = -number;
    }

    // Round correctly so that print(1.999, 2) prints as "2.00"
    double rounding = 0.5;
    for (uint8_t i = 0; i < digits; ++i)
    {
        rounding /= 10.0;
    }

    number += rounding;

    // Extract the integer part of the number and print it
    unsigned long int_part = (unsigned long)number;
    double remainder = number - (double)int_part;
    n += print(int_part);

    // Print the decimal point, but only if there are digits beyond
    if (digits > 0)
    {
        n += print(".");
    }

    // Extract digits from the remainder one at a time
    while (digits-- > 0)
    {
        remainder *= 10.0;
        unsigned int toPrint = (unsigned int)remainder;
        n += print(toPrint);
        remainder -= toPrint;
    }

    return n;
}

//****************************************************************************
//                                 END OF FILE
//****************************************************************************
